Those that use the 3M dremel tool radial bristle discs, other than being on the pricey side, can you comment on what you like or don't like about them here? The finest is 1 micron I see. Since the abrasive is throughout the entire bristles you can use them all the way down to the nub. Do they last a long time? What is the radius of the ones you use? Where's the cheapest place you've found them? Just some questions to start off.

Thanks

Chris L